Leaving a team cannot be undone

From the Dashboard, head to the settings of the project you wish to leave.

Click on the Maintainers tab.

Click on Edit list on the right hand side.

Select your account from the list and hit Delete.

A project must have a minimum of one Maintainer. If you're the only Maintainer for the project, add another Maintainer before removing yourself from the Project. Once you remove yourself from the project, you'll no longer have access to it.